install ceph luminous package in centos7 based image

Signed-off-by: Huamin Chen <[email protected]>

images/base/Dockerfile.centos7

@@ -5,7 +5,9 @@
 # The standard name for this image is openshift/origin-base
 #
 FROM openshift/origin-source
-
+ENV CEPH_VERSION "luminous"
+RUN rpm -Uvh https://download.ceph.com/rpm-$CEPH_VERSION/el7/noarch/ceph-release-1-1.el7.noarch.rpm && \
+    yum install epel-release -y
 RUN INSTALL_PKGS="bsdtar ceph-common device-mapper device-mapper-persistent-data e2fsprogs ethtool findutils git hostname iptables lsof nmap-ncat socat sysvinit-tools tar tree util-linux wget which xfsprogs" && \
     yum --disablerepo=origin-local-release install -y ${INSTALL_PKGS} && \
     rpm -V ${INSTALL_PKGS} && \